Xerox Corporation

John B Wells

John W Weigl

Edward Forest

Paul C Swanton

A finely divided imaging composition is provided comprising at least two differently colored pigment particles dispersed and bound in a polymeric matrix, at least one of said particles of said matrix being electrically photosensitive, said imaging composition exhibiting the resultant color of the differently colored pigments and being capable of forming images in said resultant color without color or particle separation. Images formed of this composition can be selectively modified.

Methods of changing color by image disruption

A finely divided imaging composition is provided comprising at least two differently colored pigment particles dispersed and bound in a polymeric matrix, at least one of said particles of said matrix being electrically photosensitive, said imaging composition exhibiting the resultant color of the differently colored pigments and being capable of forming images in said resultant color without color or particle separation. Images formed of this compositon can be selectively modified.

Migration imaging method involving color change

A method of selectively reinking an imaged master having residual ink on its image areas after transfer of an image to a receiving member, comprising interposing a screen between and in contact with said master and an inking member containing a viscous lithographic ink, the web of said screen coated with an ink releasing adhesive material having an adhesive release value when dry of less than about 100 grams per inch, and passing ink through the pores of said screen to only the imaged portions of said master.

Inking in litho printing through a non-imaged screen

A process for preparing a resilient foamed imaged printing master is provided. The process comprises depositing a conversion imaging fluid in image configuration on a printing master, said conversion fluid comprising an expandable polymer containing an encapsulated blowing agent and activating said blowing agent to expand said polymer and form a resilient foamed developed image.

Process for preparing resilient blown imaged printing masters

Disclosed is a method of duplicating and imaged master comprised of a marking material distributed in an imagewise manner upon a substrate. The method involves contacting the master with a highly viscoelastic inking composition comprising: A. a silicon containing block copolymer having polymeric silicone segments and polymeric segments of a material which is adhesive to the material comprising the image; B. a coloring agent; and C. a solvent in which the copolymer is soluble but which is a non-solvent for the marking material. The inked master is then contacted under pressure with a transfer member to thereby transfer the ink to the transfer member in imagewise configuration.

Imaging method

A novel method of preparing a waterless lithographic master and a method of printing therefrom are provided. To prepare the printing master, a suitable ink accepting substrate such as aluminum, paper or plastic, is coated with a silicone gum curing catalyst, preferably suspended in a hydrophilic binder. A barrier fusable particulate hydrophobic image pattern is then deposited on said coated substrate and fused to mask said curing catalyst in the image areas. The substrate is then coated with an uncured silicone gum, preferably as an aqueous emulsion so that the gum does not adhere to the hydrophobic image pattern. The silicone gum is then cured in the nonimage areas to selectively provide ink receptive image areas and ink releasing nonimage areas. The method of printing comprises the additional steps of applying ink to the imaged master and contacting the inked master with an image receiving surface to thereby transfer the inked image.

Process for preparing waterless lithographic masters

An electrophoretic imaging process wherein a suspension of particles in a carrier liquid are placed between a photoconductive electrode and a second electrode. With an electrical field applied between the photoconductive electrode and the second electrode the photoconductor is exposed to imagewise radiation which causes particles on the surface of the photoconductive electrode to be driven away in image configuration by charge exchange with the photoconductive electrode. The migrating particles form a negative image on the second electrode leaving a positive image behind on the photoconductive electrode.

Electrophoretic imaging members

A process for preparing a gravure printing member is provided in which a multi-celled member, such as a gravure ink roller, containing a liquid but hardenable material below the contact plane of the cells is contacted with an electrostatographic latent image member, the members separated whereby the liquid is removed from the image areas of the celled member by electrostatic attraction and the liquid hardened in the non-image areas of said celled member to provide the printing member.

Growing community of inventors

Savannah, NY, United States of America

John B Wells